Luggage storage in Pudong Airport

Hello,

We have about a9 hour layover in Shanghai and want to do a quick trip into city without taking our luggages. I see that there is storage available at the airport but in the interest of time, do you suggest we store luggage in arrivals or departures area for quick and easy pickup? and how long does the whole process take to drop off the luggage and pick them up? I want to make sure I have ample time to catch my connecting flight. I was planning to get back to airport 3 hours before my flight so hoping the pickup doesn’t take too long.